SHAREHOLDERS' EQUITY - Changes in Accumulated Other Comprehensive Income (Detail) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2024	Dec. 31, 2023	Dec. 31, 2022
Accumulated Other Comprehensive Income [Roll Forward]
Balance, beginning of period	$ 21,985	$ 20,140	$ 17,031
Other comprehensive income (loss), net of tax	2,542	909	1,982
Balance, end of period	26,098	21,985	20,140
Unrealized Foreign Currency Translation Gains (Losses)
Accumulated Other Comprehensive Income [Roll Forward]
Balance, beginning of period	(4,069)	(3,564)	(1,985)
Other comprehensive income loss before reclassifications net of tax	(929)	(505)	(1,579)
Amounts reclassified from accumulated other comprehensive income (loss) net of tax	0	0	0
Other comprehensive income (loss), net of tax	(929)	(505)	(1,579)
Balance, end of period	(4,998)	(4,069)	(3,564)
Unrealized Gains (Losses) on Fixed Maturity Securities
Accumulated Other Comprehensive Income [Roll Forward]
Balance, beginning of period	1,139	(702)	9,602
Other comprehensive income loss before reclassifications net of tax	(959)	1,972	(9,946)
Amounts reclassified from accumulated other comprehensive income (loss) net of tax	(156)	(131)	(358)
Other comprehensive income (loss), net of tax	(1,115)	1,841	(10,304)
Balance, end of period	24	1,139	(702)
Unrealized Gains (Losses) on Derivatives
Accumulated Other Comprehensive Income [Roll Forward]
Balance, beginning of period	(22)	(27)	(30)
Other comprehensive income loss before reclassifications net of tax	(3)	1	(1)
Amounts reclassified from accumulated other comprehensive income (loss) net of tax	5	4	4
Other comprehensive income (loss), net of tax	2	5	3
Balance, end of period	(20)	(22)	(27)
Effect of Changes in Discount Rate Assumptions
Accumulated Other Comprehensive Income [Roll Forward]
Balance, beginning of period	(2,560)	(2,100)	(15,832)
Other comprehensive income loss before reclassifications net of tax	4,566	(460)	13,732
Amounts reclassified from accumulated other comprehensive income (loss) net of tax	0	0	0
Other comprehensive income (loss), net of tax	4,566	(460)	13,732
Balance, end of period	2,006	(2,560)	(2,100)
Pension Liability Adjustment
Accumulated Other Comprehensive Income [Roll Forward]
Balance, beginning of period	(8)	(36)	(166)
Other comprehensive income loss before reclassifications net of tax	20	28	111
Amounts reclassified from accumulated other comprehensive income (loss) net of tax	(2)	0	19
Other comprehensive income (loss), net of tax	18	28	130
Balance, end of period	10	(8)	(36)
Accumulated Other Comprehensive Income (Loss)
Accumulated Other Comprehensive Income [Roll Forward]
Balance, beginning of period	(5,520)	(6,429)	(8,411)
Other comprehensive income loss before reclassifications net of tax	2,695	1,036	2,317
Amounts reclassified from accumulated other comprehensive income (loss) net of tax	(153)	(127)	(335)
Other comprehensive income (loss), net of tax	2,542	909	1,982
Balance, end of period	$ (2,978)	$ (5,520)	$ (6,429)